{"operation":"document","citation":"49 CFR 172.556","title":"RADIOACTIVE placard.","source_type":"regulation","agency":"Pipeline and Hazardous Materials Safety Administration","status":"current","official":true,"published_on":null,"effective_on":"2026-08-18","summary":"(a) Except for size and color, the RADIOACTIVE placard must be as follows:\n\n(b) In addition to complying with § 172.519, the background color on the RADIOACTIVE placard must be white in the lower portion with a yellow triangle in the upper portion. The base of the yellow triangle must be 29 mm ±5 mm","machine_formats":{"json":"https://regulus.evalyn.ai/document/49-cfr-172-556.json","markdown":"https://regulus.evalyn.ai/document/49-cfr-172-556.md"},"app_url":"https://regulus.evalyn.ai/document/49-cfr-172-556","source_url":"https://www.ecfr.gov/on/2026-08-18/title-49/section-172.556","body":"(a) Except for size and color, the RADIOACTIVE placard must be as follows:\n\n(b) In addition to complying with § 172.519, the background color on the RADIOACTIVE placard must be white in the lower portion with a yellow triangle in the upper portion. The base of the yellow triangle must be 29 mm ±5 mm (1.1 inches ±0.2 inches) above the placard horizontal center line. The symbol, text, class number and inner border must be black.\n\n[Amdt. 172-123, 56 FR 66264, Dec. 20, 1991; Amdt. 172-130, 58 FR 51531, Oct. 1, 1993; 65 FR 58627, Sept. 29, 2000]","truncated":false,"body_characters":546}